Transfer window for teachers?

Over the past few days I have had several discussions with colleagues about teachers not being able to move from one education job to another other than at specified times in the year. This would have the obvious advantage of disruption to pupils' learning being minimised and would mirror the arrangement in professional football. In to flight football clubs can only transfer players between each other during certain times of the year, referred to as 'transfer windows'. For example, the lead up to the examination period in May would be an obvious time to avoid. I understand that some private schools ensure that contracts always run for a whole session. If this arrangement can work in the world of professional football, could it work in the world of education? Are there examples anywhere in the world, where such a model operates successfully?